CXMT G5 DRAM is in mass production, and export controls did not stop it
Key takeaways
- CXMT G5 DRAM hits an 11.95nm active area half pitch using quadruple patterning instead of EUV
- The company claims at least 50 percent more dies per wafer than its previous generation
- Three 12 inch fabs give CXMT a combined 300,000 wafers per month
- Samsung, SK Hynix and Micron are sold out into 2027, so a fourth supplier matters
CXMT announced on 20 September that its fifth generation DRAM platform is in mass production. The headline number is an 11.95 nanometre active area half pitch, reached without a single EUV lithography machine. China has been barred from buying those machines since 2019.
What CXMT G5 DRAM actually achieves
The workaround is quadruple patterning, which means running the wafer through the same lithography step four times to build a pattern finer than the tool can print in one pass. It is slower per wafer and it costs more per step. It also works, which is the point.
The yield claim is the number worth watching: at least 50 percent more dies per wafer than the previous generation. Die count per wafer is where DRAM economics live, so a jump that size changes what CXMT can sell profitably rather than just what it can demonstrate.
Two 24Gb LPDDR5X parts are already shipping, in 496 ball and 245 ball packages. They are going into mainstream Chinese flagship phones now, not into a pilot programme.
The capacity number is the story
CXMT is running three 12 inch fabs, two in Hefei and one in Beijing, at a combined 300,000 wafers per month. For scale, that is a supplier operating at a tier the export controls were designed to prevent for roughly a decade.
Set that against the current market. Samsung, SK Hynix and Micron are effectively sold out into 2027, and contract prices for RAM have roughly doubled across this year. We covered the knock on effects when memory and SSD prices started climbing in earnest, and nothing since has loosened supply.
A fourth supplier with 300,000 wafers a month of capacity does not fix that in a quarter. It does change the shape of the 2027 forecast, because the three incumbents have been pricing on the assumption that nobody else could reach this node.
What it means if you are buying RAM
Nothing immediately. CXMT's output is aimed at the Chinese domestic market, and Western retail pricing is still set by the incumbent three. Anyone waiting for a price drop before upgrading should read our breakdown of whether to buy RAM now or hold until late 2026, because the timing argument has not changed this week.
If you are building now rather than waiting, a 32GB DDR5 kit like the Corsair Vengeance RGB DDR5 6000MHz CL30 is the sensible middle of the market. Check current pricing on Amazon before committing, because it has moved more than once this quarter.
What to watch
Watch for independent yield data, because right now 50 percent is a company figure with nothing behind it. Then watch for the parts appearing outside China, which is the point at which the incumbents have to answer on price rather than on press releases. The same question is running in parallel on the accelerator side, where Huawei's Ascend roadmap is aimed at Nvidia in early 2027.
Export controls were built on the assumption that advanced DRAM needs EUV. Quadruple patterning is the expensive answer to that assumption, and the wafer numbers say it is holding.
Some links in this article are affiliate links. We may earn a small commission at no extra cost to you.
